Carl Sagan Institute

"Erupting volcanoes pumped the carbon dioxide into the atmosphere, warming the planet & melting the ice." Cosmos: Possible Worlds by Ann Druyan @NatGeo @Cornell @NatGeoBooks #COSMOSCSI #COSMOSpic.twitter.com/fubLKsJRDO

"The idea that our planet is a single organism has the ring of hollow sentimentality for many people. But it’s just a scientific fact." Cosmos: Possible Worlds by Ann Druyan @NatGeo @Cornell @NatGeoBooks #COSMOSCSI #COSMOS 2/pic.twitter.com/06gcHCXWVr

"From the land we stand on to the air we breathe, all cycles of our planet are connected to volcanoes." Dr. Esteban Gazel (@Cornell Associate Professor Earth & Atmospheric Sciences, @CSInst fellow) #COSMOSCSI #COSMOS 3/pic.twitter.com/qlx49xTPX5

"We work on determining the volatile contents (such as CO2) of volcanic eruptions using tiny droplets of melts that are captured by crystal growth, and that are our only snapshots of past eruptions." Dr. Esteban Gazel #COSMOSCSI #COSMOS 4/pic.twitter.com/sblOXfDObP

"These studies are essential to understand the role of volcanoes in the formation & evolution of planets, their atmospheres, the trigger of planetary-scale eruptions that culminated in mass extinctions, & the potential of habitability itself." Dr. Esteban Gazel #COSMOSCSI 5/pic.twitter.com/pficWH9VzB

"Could we find volcanoes on other worlds? Lisa Kaltengger’s (@CSInst director’s) team is modeling whether we can spot signs of those volcanoes exploding on world’s orbiting other stars with our telescopes." Dr. Esteban Gazel #COSMOSCSI #COSMOS @KalteneggerLisa 6/pic.twitter.com/yaYcN2ymsk

"Volcanism like on the Early Earth can also make planets further from the star than ours, nice and warm, defreezing planets on the outside of the so-called Habitable Zone." Dr. Esteban Gazel #COSMOSCSI #COSMOS 7/pic.twitter.com/f1GoUR6BqP